body {
    margin: 0 auto;
    width: 100%;
    max-width: 640px;
    min-width: 320px;
    background: #fff;
    font-size: 14px;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.5;
    color: #666;
    background-color:#fff;
   
}
ul {
    margin: 0;
    padding: 0;
    list-style: none;
}
a {
    color: #666;
    text-decoration: none;
}
/* 去掉图片外边距 */
img {
    vertical-align: top;
}
/* 头部部分 */
.app {
    height: 45px;
}
.app ul li {
    float: left;
    height: 45px;
    background-color: #333333;
    line-height: 45px;
    text-align: center;
    color: #fff;
}
.app ul li:nth-child(1) {
    width: 8%;
}
.app ul li:nth-child(2) {
    width: 10%;
}
.app ul li:nth-child(2) img {
    width: 30px;
    /* 图片和文字居中对齐是基于基线对齐的，加上这句话就是垂直居中对齐 */
    vertical-align: middle;
}
.app ul li:nth-child(3) {
    width: 57%;
}
.app ul li:nth-child(4) {
    width: 25%;
    background-color: red;
}
/* 搜索部分 */
.serch-wrap {
    position: fixed;
    width: 100%;
    max-width: 640px;
    min-width: 320px;
    height: 44px;
    overflow: hidden;
    background-color: red;
}
.serch-btn {
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 44px;
    background:red;
}
.serch-btn::before {
    content: "";
    display: block;
    width: 20px;
    height: 18px;
    background: url(../images/btn.png) no-repeat;
    margin: 14px 0 0 15px;
    
}
.serch-login {
    position: absolute;
    top: 0;
    right: 0;
    width: 40px;
    height: 44px;
    background: red;
    line-height: 44px;
    text-align: center;
    color: #fff;
}
.serch {
    position: relative;
    height: 30px;
    background: #fff;
    margin: 0 50px;
    border-radius: 15px;
    margin-top: 7px;
}
.jd-icon {
    width: 20px;
    height: 15px;
    position: absolute;
    top: 8px;
    left: 13px;
    background: url(../images/jd.png) no-repeat;
    background-size: 20px 15px;
}
.jd-icon::after {
    content: "";
    position: absolute;
    right: -8px;
    top: 0;
    display: block;
    width: 1px;height: 15px;
    background-color: #ccc;
}
.sou {
    position: absolute;
    top: 8px;
    left: 50px;
    width: 18px;
    height: 15px;
    background: url(../images/sou.png) no-repeat;
    background-size: 18px 15px;
}
 .slider img {
     width: 100%;
      
 }
 /* 品牌 */
 .brand {
     overflow: hidden;
     border-radius: 10px;
     width: 100%;
     height: 100px;
 }
 .brand div {
     float: left;
     width: 50%;
 }
 .brand div img {
     width: 100%;
 }
 /* nav */
 nav {
     width: 100%;
     margin-top: 5px;
 }
 nav a {
     float: left;
     width: 20%;
     height: 80px;
     text-align: center;
 }
 nav a img {
     width: 40px;
     margin: 10px 0;
 }
 nav a span {
     display: block;
 }
 .dongjia {
     width: 100%;

 }
 .dongjia img {
     width: 100%;
 }
 /* text内容展示部分 */
 .text {
     width: 100%;
     height: 200px;
     background:#fff;
     
 }
.text-l {
    float: left;
     width: 50%;
     height: 200px;
    
 }

.text-l .text-t {
    width: 100%;
    height: 100px;
   
}
.text-l .text-b {
    width: 100%;
    height: 100px;
   
}
.text-b-l {
    float: left;
    width: 50%;
    height: 100px;
    text-align: center;
    line-height: 100px;
}
.text-b-l img {
    width: 90px;
    height: 90px;
}
.text-b-r {
    float: left;
    width: 50%;
    height: 100px;
   text-align: center;
   line-height: 100px;
}
.text-b-r img {
    width: 90px;
    height: 90px;
}
 .text-t span {
    font-size: x-large;
    color: royalblue;
    font-weight: 700;
}
p {
    font-size: 18px;
}
/* 鞋子内容 */
.text2 {
    width: 100%;
     height: 200px;
    background-color: #fff;
     
}
.everytext {
    width: 24%;
    float: left;
    text-align: center;
    border-right:1px dashed #ccc ;
} 
.everytext:nth-child(4){
    border: none;
}
.text2-t {
    width: 100%;
    height: 100px;
   
}
.text2-b {
    width: 100%;
    height: 100px;
   
}
.text2-t span {
    font-size: x-large;
    color: black;
    font-weight: 700; 
}
/* 底部部分 */
.footer {
    width: 100%;
    height: 150px;
   
}
.footer-t {
    width: 100%;
    height: 50px;
    background: #fff;
}
.footer-t a {
    display: inline-block;
    width: 22%;
    height: 50px;
    line-height: 50px;
    text-align: center;
    font-size: 18px;
    
}
.footer-t a:hover  {
  color: orangered;
}
.footer-b {
    width: 100%;
    
}
.footer-b span {
    display: block;
    font-size: 18px; 

}
.footer-b a {
  width: 33.33%;
  float: left;
  height: 100px;
  text-align: center;
  
}
.footer-b a img {
    width: 80px;
    height: 80px;
}
/* 版权部分 */
.jd {
    width: 100%;
    text-align: center;
    margin-top: 5px;
}